northview swim club has a number of members on monday. on tuesday, 22 new members joined the swim clun on wednesday 17 members cancled their membership or left the swim clun northview swim club has 33 members on thursday morning the equation m+22-17=33 repersents the situation solve the equation

1 x 10⁻⁹ expresses a very small number i.e. nanosecond using a negative power of 10. The correct answer is option b).

Computer calculation speeds are incredibly fast, and they are usually measured in very small units of time. One of these units is a nanosecond, which is equal to one billionth of a second, or 0.000000001 seconds. This unit is used to measure the time it takes for a computer to perform basic operations such as adding two numbers or accessing data from memory.

To express 0.000000001 in scientific notation using a negative power of 10, we need to determine the number of decimal places to the right of the decimal point until we reach the first non-zero digit. In this case, we count nine decimal places to the right of the decimal point before we reach the first non-zero digit, which is 1. This means that 0.000000001 can be written as 1 x 10⁻⁹.

In scientific notation, any number can be expressed as the product of a number between 1 and 10, and a power of 10. The power of 10 tells us how many places we need to move the decimal point to the left or right to express the number in standard form. In the case of 0.000000001, we need to move the decimal point nine places to the right to express the number in standard form.

By writing this number in scientific notation as 1 x 10⁻⁹, we can easily perform calculations with it and compare it to other values measured in nanoseconds. Hence option b) is the correct option.

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Answer:

D. lines A and D are perpendicular

The length of the shadow cast on level ground by a radio mast 90m high when the elevation of the sun is 40 degrees is approximately 85.3 meters.

To calculate the length of the shadow, we need to use trigonometry. We can imagine a right-angled triangle, where the height of the mast is the opposite side, the length of the shadow is the adjacent side, and the angle of elevation is 40 degrees.

Using the trigonometric function tangent (tan), we can find the length of the shadow, which is equal to the opposite side (90m) divided by the tangent of the angle of elevation (40 degrees). Therefore, the length of the shadow is approximately 85.3 meters.

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The equation of the perpendicular line to y = -3x + 4 and passing through (-6, 2) is y = (1/3)x + 4.

There are a lot of perpendicular lines that we may see in reality. The corners of a chalkboard, a window, the sides of a set square, and the Red Cross symbol are a few examples.

Knowing that the slopes of perpendicular lines are the negative reciprocals of one another is necessary to determine the equation of a line perpendicular to a given line.

The given line has a slope of -3, so the slope of a line perpendicular to it would be the negative reciprocal of -3, which is 1/3.

We also know that the line passes through the point (-6, 2).

The equation of the line passing through (-6, 2) and perpendicular to y = -3x + 4 can be found using the point-slope form of a line:

y - 2 = (1/3)(x + 6)

Simplifying this equation, we get:

y = (1/3)x + 4

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The number of triangles formed or the interior angle sum should be matched to each regular polygon as follows;

In Mathematics and Geometry, the sum of the interior angles of both a regular and irregular polygon can be calculated by using this formula:

Sum of interior angles = 180 × (n - 2)

1,440 = 180 × (n - 2)

1,440 = 180n - 360

180n = 1,440 + 360

n = 1,800/180

n = 10 (decagon).

Sum of interior angles = 180 × (n - 2)

1,800 = 180 × (n - 2)

1,800 = 180n - 360

180n = 1,800 + 360

n = 2,160/180

n = 12 (dodecagon).

Generally speaking, the number of triangles in a regular polygon (n-gon) can be calculated by using this formula;

Number of triangles = n - 2

4 = n - 2

n = 4 + 2 = 6 (regular hexagon).

Number of triangles = n - 2

6 = n - 2

n = 6 + 2 = 8 (regular octagon).

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The measurement of the two shorter sides in Monica's wrapping paper is 17 inches.

We can use proportions to solve this problem. Since Francisco's piece of paper is similar to Monica's piece of paper, the ratios of the corresponding sides will be equal. Specifically, we have:

17 / x = 34 / y

where x is the length of one of Francisco's shorter sides, and y is the length of one of Monica's shorter sides.

To solve for y, we can cross-multiply and simplify:

17y = 34x

y = 2x

So the length of one of Monica's shorter sides is half the length of one of her longer sides, or:

y = 1/2 * 34 = 17

Therefore, the measurement of the two shorter sides in Monica's wrapping paper is 17 inches. Answer: a. inches.

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Trevor spent a mean amount of $0.85 per day on snacks during

Week 1.

We have,

To determine during which week Trevor spent a mean amount of $0.85 per day on snacks, we need to calculate the mean (average) amount spent per day for each week and find the week that matches $0.85.

Let's calculate the mean amount spent per day for each week:

Week 1:

= (0.50 + 0.75 + 0.50 + 1.00 + 1.25 + 1.25 + 0.75 + 0.25 + 1.00) / 9

= $0.86 (approximately)

Week 2:

= (1.00 + 0.50 + 0.75 + 0.25 + 0.25 + 1.25 + 0.25) / 7

= $0.61 (approximately)

Week 3:

= (0.75 + 1.00) / 2

= $0.88

Week 4:

= (1.25 + 1.00 + 1.00 + 1.25 + 0.50) / 5

= $1.00

From the calculations, we can see that the mean amount spent per day for Week 1 is closest to $0.85.

Therefore,

Trevor spent a mean amount of $0.85 per day on snacks during

Week 1.

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La probabilidad de que no haya demoras en un viaje de ida y vuelta es 0.64 (64%).

La probabilidad de que no haya demoras en un viaje de ida y vuelta se puede calcular utilizando la probabilidad complementaria. Si la probabilidad de que un vuelo se retrase es 0.2 (20%), entonces la probabilidad de que no haya retrasos en un vuelo individual es 1 - 0.2 = 0.8 (80%).

Para un viaje de ida y vuelta, la probabilidad de que no haya retrasos en ambos vuelos se calcula multiplicando las probabilidades de no retraso de cada vuelo.

Entonces, la probabilidad de que no haya demoras en un viaje de ida y vuelta sería 0.8 * 0.8 = 0.64 (64%), o 64 de cada 100 viajes de ida y vuelta no experimentarían retrasos.

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The coordinates of point B are (4.25, 7.5), which is closest to option D (4.25, 8.25).

To find the coordinates of point B, we need to use the concept of section formula which states that if a line segment with endpoints A(x1, y1) and C(x3, y3) is partitioned by a point B(x2, y2) such that AB:BC = m:n, then the coordinates of B are given by:

x2 = (mx3 + nx1)/(m + n)
y2 = (my3 + ny1)/(m + n)

Here, A has coordinates (2, 6) and C has coordinates (5, 9). Let the ratio AB:BC be 3:1, which means that m = 3 and n = 1. Substituting these values in the formula, we get:

x2 = (3*5 + 1*2)/(3 + 1) = 17/4 = 4.25
y2 = (3*9 + 1*6)/(3 + 1) = 30/4 = 7.5

Therefore, the coordinates of point B are (4.25, 7.5), which is closest to option D (4.25, 8.25).

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To understand how to approach problems involving similar triangles, parallel lines, and proportional parts.

When you have two similar triangles, their corresponding sides are proportional. This means that the ratio between the sides of one triangle is the same as the ratio between the sides of the other triangle.

If you have parallel lines cut by a transversal, corresponding angles will be congruent, which can help establish similarity between triangles.

For example, if you have two similar triangles ABC and DEF, where AB/DE = BC/EF = AC/DF, then you can use these ratios to solve for unknown side lengths or other values.

To answer questions 1-16, identify the given information and determine whether the triangles are similar. If they are, use the proportional relationships to solve for the unknowns.

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How do you solve these problems on Unit 6: similar triangles homework 5: parallel lines and proportional parts?

7. X-5/6 = 14/2x+3

16. X-7/35 = 4/x-3

Two sides of a plot measure 32 m and 24 m and the angle between them is a perfect right angle. The other two sides measure 25 m each and the other three angles are not right angles. The area of the plot is 384 sq meters.

The Pythagorean theorem is a fundamental geometric idea that deals with the connections between the sides of right triangles. The square of the length of the hypotenuse (c) of a right triangle is equal to the sum of the squares of the lengths of the other two sides, according to the theorem (a and b). This may be stated mathematically as follows:

c² = a² + b²

Pythagoras, the ancient Greek mathematician who is credited with inventing the theorem, is named for him. It is employed in domains like physics, astronomy, and surveying and has extensive applications in mathematics, science, and engineering.

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Answer:

Step-by-step explanation:

The plot is in the shape of a trapezium with two sides measuring 32 m and 24 m, and two other sides measuring 25 m each.

To find the area of the plot, we need to first find the height of the trapezium. We can use the Pythagorean theorem to do this.

The side opposite to the right angle is the hypotenuse of the right-angled triangle formed by the two sides measuring 25 m each. So,

h² = 25² - 24²

h² = 625 - 576

h² = 49

h = 7

Therefore, the height of the trapezium is 7 m.

The area of a trapezium is given by the formula:

Area = (sum of parallel sides) x (height) / 2

In this case, the sum of the parallel sides is:

32 + 24 = 56

So, the area of the plot is:

Area = 56 x 7 / 2

Area = 196 m²

Therefore, the area of the plot is 196 square meters.

Stella drove 150 miles this week to and from school in the van.

To determine how many miles Stella drove this week, we can use the given information about the van's gas mileage.

First, we know that the van can drive 60 miles using 10 gallons of gasoline. We can calculate the miles per gallon (mpg) by dividing the miles driven by the gallons of gasoline used:
[tex]Miles per gallon (mpg) = \frac{60 miles}{10 gallons}  = 6 mpg[/tex]

Now, we know that Stella used 25 gallons of gas driving to and from school this week in the van. To find out how many miles she drove, we can multiply the gallons of gas she used by the van's mpg:
Miles driven = 25 gallons x 6 mpg = 150 miles

So, Stella drove 150 miles this week to and from school in the van. We know this by calculating the van's gas mileage (6 mpg) and multiplying it by the gallons of gas Stella used (25 gallons).

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The drink mix that is needed to make one cup of drink is 21/20

Ali uses 21/2 scoops of drink mix to make 10 cups off drinks

The amount of drink mix needed to make one cup can be calculated as follows

21/2= 10

x= 1

cross multiply both sides

10x= 21/2

Divide by the coefficient of x which is 10

x= 21/2 ÷ 10

x= 21/2 × 1/10

x= 21/20

Hence the drink mix needed to make one cup is 21/20

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The actual percent loss on the original $7000 investment is 46%. This means that the investment consultant's statement of a 10% overall increase is not accurate.

To calculate the actual percent gain or loss on the original $7000 investment, we can use the following formula:

Actual percent gain or loss = (Ending value - Beginning value) / Beginning value * 100%

At the end of the first year, the investment decreased by 70% of its original value, which means its value was only 30% of $7000, or $2100.

At the end of the second year, the investment increased by 80% of the value it had at the end of the first year. So, its value at the end of the second year was:

Value at end of second year = $2100 + 80% of $2100
Value at end of second year = $2100 + $1680
Value at end of second year = $3780

Therefore, the actual percent gain or loss on the original $7000 investment is:

Actual percent gain or loss = ($3780 - $7000) / $7000 * 100%
Actual percent gain or loss = -46%

So, the actual percent loss on the original $7000 investment is 46%.

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The approximate length of the crust when x = 1.2 is 17.28 centimeters. The correct option is D.

To find the total perimeter of Sydney's sandwich, we need to add up the lengths of all four sides. From the given dimensions, we can see that the top and bottom sides each have a length of 2x²8, and the right and left sides each have a length of 2x²9. Therefore, the total perimeter can be expressed as:

2(2x²8) + 2(2x²9)

Simplifying this expression gives:

4x²8 + 4x²9

And further simplifying by factoring out 4x² gives:

4x²(8 + 9)

Which equals:

4x²17

Now, to find the approximate length of the crust when x = 1.2, we simply plug in this value for x into the expression we just found:

4(1.2)²17

Simplifying this expression gives:

4(1.44)17

Which equals:

5.76 + 11.52 = 17.28

Therefore, the approximate length of the crust when x = 1.2 is 17.28 centimeters. The answer is option D, which is 4x²17; 22.76 centimeters.

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Answer:they cannot conclude the mean price

Step-by-step explanation:

khan

At the α=0.01 significance level, there is not enough evidence to conclude that the mean price of gasoline in your state is more than $3 per gallon on that day.

Here you collected a random sample of 40 gas stations and calculated the sample mean (bar x) and the sample standard deviation (sₓ).

In this case, you found that the test statistic t was approximately 0.65, and the P-value was approximately 0.260. The P-value is the probability of observing a test statistic as extreme as the one you calculated, assuming that the null hypothesis is true.

A P-value of 0.260 means that if the null hypothesis were true, there is a 26% chance of observing a sample mean as extreme or more extreme than the one you calculated.

To make a decision about the hypothesis, you need to compare the P-value to the significance level (α), which represents the maximum probability of rejecting the null hypothesis when it is actually true. In this case, the significance level is set to α=0.01, which means that you want to be 99% confident in your decision.

If the P-value is less than the significance level, you reject the null hypothesis in favor of the alternative hypothesis.

If the P-value is greater than the significance level, you fail to reject the null hypothesis.

In this case, the P-value is greater than the significance level, which means that you fail to reject the null hypothesis.

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Complete Question:

An economist studying fuel costs suspected that the mean price of gasoline in her state was more than $3 per gallon on a certain day. On that day, she sampled 40 gas stations to test H0:μ=$3

Ha​:μ>$3

where μ is the mean price of gasoline per gallon that day in her state.

The sample data had a mean of bar x=$3.04 and a standard deviation of sₓ=$0.39

These results produced a test statistic of t≈0.65 and a P-value of approximately 0.260

Assuming the conditions for inference were met, what is an appropriate conclusion at the α=0.01  significance level?

The system of equations is:

Revenue from balcony seats = $10 × B

Revenue from main floor seats = $25 × M

Total revenue = $6250

B = 3M + 20

Let's define the following variables:

B = number of balcony seats sold

M = number of main floor seats sold

We know that the price of a balcony seat is $10 and the price of a main floor seat is $25.

From the given information, we can create the following equations:

The total revenue from balcony seats sold (B) is given by: Revenue from balcony seats = $10 × B

The total revenue from main floor seats sold (M) is given by: Revenue from main floor seats = $25 × M

The total revenue from the afternoon performance is $6250: Total revenue = Revenue from balcony seats + Revenue from main floor seats

The number of balcony seats sold (B) is 20 more than 3 times the number of main floor seats (M): B = 3M + 20

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Reactions at points A, C, and F are as follows: RA = -RC, RAy = RCy, and RF = 10 kN.

To determine reactions at points A, C, and F for the assembly consisting of two 10mm diameter rods (A-B and C-D), a 20mm diameter rod (E-F), and a rigid bar (H), with point G located midway between points E and F, and a force of 10 kN applied:

First, calculate the cross-sectional areas of the rods:
A1 = π(10mm)² / 4 = 78.54 mm² (for rods A-B and C-D)
A2 = π(20mm)² / 4 = 314.16 mm² (for rod E-F)

Next, calculate the effective modulus of elasticity for each rod:
E1 = E2 = 101 GPa

Now, use equilibrium equations to determine reactions at points A, C, and F:
ΣFx = 0: RAx + RCx = 0
ΣFy = 0: RAy + RCy + RF = -10 kN
ΣMG = 0: (RAy)(L/2) - (RCy)(L/2) = 0

Solving the equilibrium equations, we get:
RAx = -RCx
RAy = RCy
RF = 10 kN

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Answer:

A regular n-gon with one interior angle of 150° has 12 sides.

Step-by-step explanation:

The formula for the measure of each interior angle of a regular n-gon is:

where:

We are given that one interior angle measures 150°, so we can set up the equation:

Multiplying both sides by n, we get:

Distributing, we get:

Subtracting 150n from both sides, we get:

Adding 360 to both sides, we get:

Dividing both sides by 30, we get:

Therefore, a regular n-gon with one interior angle of 150° has 12 sides.

Place value is the value of a digit based on its position within a number system. To solve the equation 19 + 50, we use place value to add the digits in the ones and tens place.

Place value is a fundamental concept in mathematics that helps in understanding the value of digits in a number system. In the decimal system, each digit's value depends on its position relative to the decimal point, with the position to the left representing higher values than those to the right.

To solve 19 + 50, we add the digits in the ones place (9 + 0 = 9) and the digits in the tens place (1 + 5 = 6) separately, then combine the results to get the final answer of 69. This is possible due to the place value concept. The digit 9 in the ones place of 19 represents a value of 9 units, while the digit 1 in the tens place represents 10 units.

Similarly, the digit 5 in the tens place of 50 represents 50 units, and the digit 0 in the ones place represents 0 units. By adding the digits based on their place value, we get the answer 69, where 9 is in the ones place and 6 is in the tens place.

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A. The joint probability distribution is:
- P(X=2, Y=0) = 6/1332
- P(X=1, Y=1) = 36/1332
- P(X=0, Y=2) = 30/1332

B. The expected value of playing this game is approximately $0.19 each time you play.

A. To find the joint probability distribution, we need to determine the probabilities of all possible outcomes for X and Y when selecting two marbles from the bag.

There are a total of 37 marbles in the bag (3 gold, 6 silver, and 28 black).

1. Probability of selecting 2 gold marbles (X=2, Y=0):
(3/37) * (2/36) = 6/1332

2. Probability of selecting 1 gold and 1 silver marble (X=1, Y=1):
(3/37) * (6/36) + (6/37) * (3/36) = 36/1332

3. Probability of selecting 2 silver marbles (X=0, Y=2):
(6/37) * (5/36) = 30/1332

So, the joint probability distribution is:

- P(X=2, Y=0) = 6/1332
- P(X=1, Y=1) = 36/1332
- P(X=0, Y=2) = 30/1332

B. To find the expected value of playing the game, we need to calculate the probability of selecting each type of marble and multiply it by its corresponding value.

1. Probability of selecting a gold marble: 3/37
Winning amount: $3

2. Probability of selecting a silver marble: 6/37
Winning amount: $2

3. Probability of selecting a black marble: 28/37
Losing amount: -$1

Expected value = (3/37 * $3) + (6/37 * $2) + (28/37 * -$1)
= 9/37 + 12/37 - 28/37
= -7/37

So, the expected value of playing this game is -$7/37, which means you can expect to lose approximately $0.19 each time you play.

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The equation of the tangent line to f(x) is y = -4x + 4

The equation of the tangent line to f(x) = 1/x at a point x = a is given by:

y - f(a) = f'(a) * (x - a)

where f'(x) is the derivative of f(x) with respect to x.

We can find a "nice" point near 0.504 by choosing a = 0.5, which is close to 0.504 and makes the calculation easy.

The derivative of f(x) = 1/x is given by:

[tex]f'(x) = -1/x^2[/tex]

At x = 0.5, we have:

f(0.5) = 1/0.5 = 2

[tex]f'(0.5) = -1/(0.5)^2 = -4[/tex]

Plugging these values into the equation of the tangent line, we get:

y - 2 = -4 * (x - 0.5)

Simplifying, we get:

y = -4x + 4

Now we can use this tangent line to approximate (1/0.504) as follows:

(1/0.504) ≈ y(0.504)

Plugging x = 0.504 into the equation of the tangent line, we get:

y(0.504) = -4(0.504) + 4 = 1.784

Therefore, (1/0.504) ≈ 1.784

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The perimeter of the bedroom is 116ft

A rectangle is a type of quadrilateral, whose opposite sides are equal and parallel.

The perimeter of a rectangle is expressed as;

P = 2(l+w)

where l is the length and w is the width of the rectangle.

length = √ 21-21)²+ 18-(-7)²

= √25²

l = 25 ft

width = √ 21-(-12)²+18-18)²

= √ 33²

= 33

Perimeter = 2(33+25)

= 2 × 58

= 116ft

therefore the perimeter of the bedroom is 116ft.

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The first derivative of the implicit function given by x^(2/3) + y^(2/3) = 14 can be found using implicit differentiation. We take the derivative of both sides with respect to x and use the chain rule to differentiate the terms involving y:(2/3)x^(-1/3) + (2/3)y^(-1/3) * dy/dx = 0Then, we solve for dy/dx:dy/dx = -(x/y)^(1/3)This is the first derivative of the implicit function. To evaluate it at a specific point, we need to substitute the coordinates of that point into the equation above.

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[tex]dy/dx = -x^{-1/3} / y^{-1/3}[/tex]

To find the first derivative of the given equation x^{2/3} + y^{2/3} = 14, we will differentiate both sides of the equation with respect to x and then solve for dy/dx (the first derivative of y with respect to x).

Step 1: Differentiate both sides of the equation with respect to x.
[tex]d/dx (x^{2/3} + y^{2/3}) = d/dx (14)[/tex]

Step 2: Apply the chain rule to differentiate y^{2/3}.
[tex]d/dx (x^{2/3}) + d/dx (y^{2/3}) = 0(2/3)x^{-1/3} + (2/3)y^{-1/3}(dy/dx) = 0[/tex]

Step 3: Solve for dy/dx.
[tex](2/3)y^{-1/3}(dy/dx) = -(2/3)x^{-1/3}dy/dx = -(2/3)x^{-1/3} / (2/3)y^{-1/3}[/tex]

Step 4: Simplify the expression.
[tex]dy/dx = -x^{-1/3} / y^{-1/3}[/tex]

Your answer: [tex]dy/dx = -x^{-1/3} / y^{-1/3}[/tex]

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The amount of Pure alcohol must a pharamacist add to 10cm cubed of a 8% alcohol solution to strengthen it to a 80% solution is 36 cm³.

Alcohol, also known as ethanol is a clear, colorless liquid that is produced by the fermentation of sugars and carbohydrates by yeasts.

Let's start by writing down the equation that relates the amount of alcohol in the original 8% solution to the amount of alcohol in the final 80% solution:

0.08x(10 +x)

Here, x represents the amount of pure alcohol that we need to add to the 10 cm³ of 8% solution to obtain the desired 80% solution.

The left-hand side of the equation represents the amount of alcohol in the original solution (which is 8% alcohol), while the right-hand side represents the amount of alcohol in the final solution (which is 80% alcohol).

Now we can solve for x:

0.08 x (10 + x) = 0.08x(10+x)

0.2x = 7.2

x = 36 cm³.

Therefore, the pharmacist must add  of pure alcohol to the  of 8% alcohol solution to obtain an 80% alcohol solution.

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The value of x and y for the angles are 4 and 9 respectively.

An exponential equation is an expression that shows how numbers and variables using mathematical operators.

10x - 4 = 6(x + 2)     (opposite angles are equal to each other)

10x - 4 = 6x + 12

4x = 16

x = 4

Also:

18y - 18 = 16y

2y = 18

y = 9

The value of x and y are 4 and 9 respectively.

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Answer:

-12+3(-11)-40-10

Step-by-step explanation:

Answer:

Step-by-step explanation:

-12+12-45-40+1

0-85+1

-84

We can start by using the formula for the volume of a cylinder, which is:

V = πr^2h

where V is the volume, r is the radius (half of the diameter), and h is the height.

In this problem, we are given the height and volume of the can, but we need to find the diameter (which is twice the radius). We can rearrange the formula above to solve for the radius:

r = √(V/πh)

Substituting the given values, we get:

r = √(144/π x 11.4) ≈ 1.5 cm

Finally, we can find the diameter by doubling the radius:

d = 2r ≈ 3 cm

Therefore, the can's diameter is approximately 3 centimeters.

The average price of a gallon of milk in the following years, using the exponential growth function, are:

a) 2018 = $2.90

  2021 = $3.55

b) Based on the exponential growth function, the cost of milk is inflating at 7% per year.

c) Based on the percentage of inflation, the predicted price of a gallon of milk in 2025 is $4.66.

An exponential growth function is a mathematical equation that describes the relationship between two variables (dependent and independent).

Under the function, there is a constant ratio of growth with the number of years between the initial value and the desired value as the exponent.

The given function for the price of average gallon of milk from 2008 to 2021 is 3.55 = 2.90 (1 + x)³.

Average price of milk in 2018 = $2.90

Average price of milk in 2021 = $3.55

Change in the average price of milk = $0.65 ($3.55 - $2.90)

The percentage change from 2018 to 2021 = 22.41% ($0.65 ÷ $2.90 x 100)

The cost of milk is inflating annually at (1 + x)^3

x = 7%

Cost of milk in 2025 = y

Number of years from 2018 to 2025 = 7 years

y = 2.90 (1 + 0.07)⁷

y = 2.90 (1.07)⁷

y = $4.66

Learn more about exponential growth functions at https://brainly.com/question/13223520.

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